1
|
Bílek J, Koval D, Sázelová P, Šolínová V, Severa L, Gutiérrez PER, Teplý F, Kašička V. The separation of the enantiomers of diquats by capillary electrophoresis using randomly sulfated cyclodextrins as chiral selectors. J Sep Sci 2023; 46:e2300417. [PMID: 37528727 DOI: 10.1002/jssc.202300417] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/25/2023] [Accepted: 07/26/2023] [Indexed: 08/03/2023]
Abstract
Diquats, derivatives of the widely used herbicide diquat, represent a new class of functional organic molecules. A combination of their special electrochemical properties and axial chirality could potentially result in their important applications in supramolecular chemistry, chiral catalysis, and chiral analysis. However, prior to their practical applications, the diquats have to be prepared in enantiomerically pure forms and the enantiomeric purity of their P- and M-isomers has to be checked. Hence, a chiral capillary electrophoresis (CE) method has been developed and applied for separation of P- and M-enantiomers of 11 new diquats. Fast and better than baseline CE separations of enantiomers of all 11 diquats within a short time 5-7 min were achieved using acidic buffer, 22 mM NaOH, 35 mM H3 PO4 , pH 2.5, as a background electrolyte, and 6 mM randomly sulfated α-, β-, and γ-cyclodextrins as chiral selectors. The most successful selector was sulfated γ-cyclodextrin, which baseline separated the enantiomers of all 11 diquats, followed by sulfated β-cyclodextrin and sulfated α-cyclodextrin, which baseline separated enantiomers of 10 and nine diquats, respectively. Using this method, a high enantiopurity degree of the isolated P- and M-enantiomers of three diquats with a defined absolute configuration was confirmed and their migration order was identified.
Collapse
Affiliation(s)
- Jan Bílek
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
| | - Dušan Koval
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
| | - Petra Sázelová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
| | - Veronika Šolínová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
| | - Lukáš Severa
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
| | - Paul E Reyes Gutiérrez
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
| | - Filip Teplý
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague 6, Czech Republic
| |
Collapse
|
2
|
Miura T, Ishihara Y, Nakamuro T, Moritani S, Nagata Y, Murakami M. Synthesis, Structure, and Dynamics of Chiral Eight-Membered Cyclic Molecules with Thienylene and Cyclopropylene Units Alternately Connected. Chemistry 2021; 28:e202103962. [PMID: 34928539 DOI: 10.1002/chem.202103962] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Indexed: 11/09/2022]
Abstract
A rhodium(II)-catalyzed asymmetric cyclooligomerization of bifunctional monomers possessing triazolyl and vinyl groups at 2,3- and 3,4-positions on the thiophene ring is studied. Structurally interesting cyclic dimers in which thienylene and cyclopropylene units are alternately connected are obtained as the major components. The eight-membered rings in the center are non-planar and adopt a tub-shaped conformation. We also observe the phenomenon of racemization caused by a tub-to-tub ring-flipping, the activation energy of which is determined as 108 kJ mol -1 by electronic circular dichroism spectra measurement.
Collapse
Affiliation(s)
- Tomoya Miura
- Okayama University, Division of Applied Chemistry, Tsushimanaka 3-1-1, 700-8530, Okayama, JAPAN
| | - Yumi Ishihara
- Kyoto University, Department of Synthetic Chemistry and Biological Chemistry, JAPAN
| | - Takayuki Nakamuro
- Kyoto University, Department of Synthetic Chemistry and Biological Chemistry, JAPAN
| | - Shunsuke Moritani
- Kyoto University, Department of Synthetic Chemistry and Biological Chemistry, JAPAN
| | - Yuuya Nagata
- Hokkaido University, Institute for Chemical Reaction Design and Discovery, JAPAN
| | - Masahiro Murakami
- Kyoto University, Department of Synthetic Chemistry and Biological Chemistry, JAPAN
| |
Collapse
|
3
|
Marczenko KM, Johnson CL, Chitnis SS. Synthesis of a Perfluorinated Phenoxyphosphorane and Conversion to Its Hexacoordinate Anions. Chemistry 2019; 25:8865-8874. [PMID: 30958579 DOI: 10.1002/chem.201901333] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Indexed: 12/19/2022]
Abstract
We report the synthesis and structural characterization of a neutral PV Lewis acid, P(OC6 F5 )5 , and salts containing the six-coordinate anions [P(OC6 F5 )5 F]- and [P(OC6 F5 )6 ]- . The latter anion exhibits a rare example of F-πarene interactions in both the solid and the solution phase, which has been quantitatively studied by variable-temperature (VT) NMR spectroscopy. The Lewis acid strength of P(OC6 F5 )5 has been assessed through experimental fluoride ion competition experiments and quantum-chemical calculations of its fluoride ion affinity (FIA) and global electrophilicity index (GEI). Our findings highlight the importance of considering solvent effects in electrophilicity calculations, even when neutral Lewis acids are involved, and show a rare divergence between FIA and GEI trends. The coordinating abilities of the [P(OC6 F5 )6 ]- and [P(OC6 F5 )5 F]- anions towards the trityl cation, as a prototypical electrophile, have been assessed.
Collapse
Affiliation(s)
- Katherine M Marczenko
- Chemistry Department, Dalhousie University, 6274 Coburg Road, Halifax, N. S., B3H 4R2, Canada
| | - Chloe-Louise Johnson
- Chemistry Department, Dalhousie University, 6274 Coburg Road, Halifax, N. S., B3H 4R2, Canada
| | - Saurabh S Chitnis
- Chemistry Department, Dalhousie University, 6274 Coburg Road, Halifax, N. S., B3H 4R2, Canada
| |
Collapse
|
4
|
Abstract
Treating PCl5 with C12H8Li2, generated from either C12H10, C12H8Br2, or C12H8I2, affords three products in different ratios depending on the source of the lithiated biphenyl. Hellwinkel’s salt [P(C12H8)2][P(C12H8)3] ([1][2]) and another product [P(C12H8)(C24H16)][P(C12H8)3] ([1′][2]) were obtained by reacting PCl5 with 2,2′-dilithiobiphenyl [Route A: 2.5 equiv.; obtained from biphenyl, n-BuLi, and TMEDA; Route B: 3.0 equiv.; obtained from 2,2′-diiodobiphenyl and n-BuLi; Route C: 4.0 equiv.; obtained from 2,2′-dibromobiphenyl and n-BuLi]. The synthesis, isolation, and characterization of the chiral spiro-compound [1′][2] and the characterization of the pentavalent phosphorane [P(C12H8)2(C12H9)] (3) are reported. The complex [1′][2] was characterized by 31P{1H} NMR spectroscopy, X-ray crystallography, and mass spectrometry. The pentavalent compound (3) was characterized by 31P{1H} NMR spectroscopy and X-ray crystallography.
Collapse
Affiliation(s)
- Khatera Hazin
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Derek P. Gates
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| |
Collapse
|
5
|
Talele HR, Koval D, Severa L, Reyes-Gutiérrez PE, Císařová I, Sázelová P, Šaman D, Bednárová L, Kašička V, Teplý F. Diquats with Robust Chirality: Facile Resolution, Synthesis of Chiral Dyes, and Application as Selectors in Chiral Analysis. Chemistry 2018; 24:7601-7604. [PMID: 29575285 DOI: 10.1002/chem.201800369] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Indexed: 12/25/2022]
Abstract
Diquats with extremely high racemization barriers with ΔG≠theor of 233 kJ mol-1 at 180 °C are described. Reported configurational robustness is due to a combination of two structural features: the rigid o-xylylene tether connecting the nitrogen atoms and the presence of two substituents in the bay region of the bipyridinium scaffold. The straightforward synthesis of diquats, plus facile resolution and derivatization make them attractive for chiral application studies. This is demonstrated by: 1) synthesis of the first non-racemic diquat dyes with pronounced chiroptical properties, and 2) capability of diquats to interact stereospecifically with chiral molecules. This suggests potential for diquat derivatives to be used as chiral selectors in separation methods.
Collapse
Affiliation(s)
- Harish R Talele
- Institute of Organic Chemistry and Biochemistry of the, Czech Academy of Sciences, Flemingovo nam. 542/2, 166 10, Prague 6, Czech Republic
| | - Dušan Koval
- Institute of Organic Chemistry and Biochemistry of the, Czech Academy of Sciences, Flemingovo nam. 542/2, 166 10, Prague 6, Czech Republic
| | - Lukáš Severa
- Institute of Organic Chemistry and Biochemistry of the, Czech Academy of Sciences, Flemingovo nam. 542/2, 166 10, Prague 6, Czech Republic
| | - Paul E Reyes-Gutiérrez
- Institute of Organic Chemistry and Biochemistry of the, Czech Academy of Sciences, Flemingovo nam. 542/2, 166 10, Prague 6, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Charles University, Hlavova 2030/8, 128 43, Prague 2, Czech Republic
| | - Petra Sázelová
- Institute of Organic Chemistry and Biochemistry of the, Czech Academy of Sciences, Flemingovo nam. 542/2, 166 10, Prague 6, Czech Republic
| | - David Šaman
- Institute of Organic Chemistry and Biochemistry of the, Czech Academy of Sciences, Flemingovo nam. 542/2, 166 10, Prague 6, Czech Republic
| | - Lucie Bednárová
- Institute of Organic Chemistry and Biochemistry of the, Czech Academy of Sciences, Flemingovo nam. 542/2, 166 10, Prague 6, Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the, Czech Academy of Sciences, Flemingovo nam. 542/2, 166 10, Prague 6, Czech Republic
| | - Filip Teplý
- Institute of Organic Chemistry and Biochemistry of the, Czech Academy of Sciences, Flemingovo nam. 542/2, 166 10, Prague 6, Czech Republic
| |
Collapse
|
6
|
Llabres-Campaner PJ, Guijarro L, Giarratano C, Ballesteros-Garrido R, Zaragozá RJ, Aurell MJ, García-España E, Ballesteros R, Abarca B. Synthesis, Optical Properties, and DNA Interaction of New Diquats Based on Triazolopyridines and Triazoloquinolines. Chemistry 2017; 23:12825-12832. [DOI: 10.1002/chem.201701618] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Pedro J. Llabres-Campaner
- Department of Organic Chemistry; Faculty of Pharmacy; University of Valencia; Av. Vicent Andrés Estellés, s/n. 46100 Burjassot Valencia Spain
| | - Lluís Guijarro
- Instituto de Ciencia Molecular (ICMOL); University of Valencia; C/ Catedrático José Beltrán, 2 46980 Paterna, Valencia Spain
| | - Claudia Giarratano
- Department of Organic Chemistry; Faculty of Pharmacy; University of Valencia; Av. Vicent Andrés Estellés, s/n. 46100 Burjassot Valencia Spain
| | - Rafael Ballesteros-Garrido
- Department of Organic Chemistry; Faculty of Pharmacy; University of Valencia; Av. Vicent Andrés Estellés, s/n. 46100 Burjassot Valencia Spain
- Instituto de Ciencia Molecular (ICMOL); University of Valencia; C/ Catedrático José Beltrán, 2 46980 Paterna, Valencia Spain
| | - Ramón J. Zaragozá
- Department of Organic Chemistry; Faculty of Chemistry; University of Valencia; Av. Vicent Andrés Estellés, s/n. 46100 Burjassot Valencia Spain
| | - M. José Aurell
- Department of Organic Chemistry; Faculty of Chemistry; University of Valencia; Av. Vicent Andrés Estellés, s/n. 46100 Burjassot Valencia Spain
| | - Enrique García-España
- Instituto de Ciencia Molecular (ICMOL); University of Valencia; C/ Catedrático José Beltrán, 2 46980 Paterna, Valencia Spain
| | - Rafael Ballesteros
- Department of Organic Chemistry; Faculty of Pharmacy; University of Valencia; Av. Vicent Andrés Estellés, s/n. 46100 Burjassot Valencia Spain
| | - Belén Abarca
- Department of Organic Chemistry; Faculty of Pharmacy; University of Valencia; Av. Vicent Andrés Estellés, s/n. 46100 Burjassot Valencia Spain
| |
Collapse
|
7
|
Hazin K, Serin SC, Patrick BO, Ezhova MB, Gates DP. [HL2][P(1,2-O2C6Cl4)3] (L = THF, DMF): Brønsted acid initiators for the polymerization of n-butyl vinyl ether and p-methoxystyrene. Dalton Trans 2017; 46:5901-5910. [DOI: 10.1039/c6dt04820j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The development of solid, weighable Brønsted acids featuring the hexacoordinated phosphorous(v) anion [TRISPHAT]− are reported.
Collapse
Affiliation(s)
- Khatera Hazin
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Spencer C. Serin
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Brian O. Patrick
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Maria B. Ezhova
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Derek P. Gates
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| |
Collapse
|
8
|
Siu PW, Hazin K, Gates DP. H(OEt2)2[P(1,2-O2C6Cl4)3]: Synthesis, Characterization, and Application as a Single-Component Initiator for the Carbocationic Polymerization of Olefins. Chemistry 2013; 19:9005-14. [DOI: 10.1002/chem.201204288] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 03/27/2013] [Indexed: 11/08/2022]
|
9
|
Torricelli F, Bosson J, Besnard C, Chekini M, Bürgi T, Lacour J. Modular Synthesis, Orthogonal Post-Functionalization, Absorption, and Chiroptical Properties of Cationic [6]Helicenes. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201208926] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
10
|
Torricelli F, Bosson J, Besnard C, Chekini M, Bürgi T, Lacour J. Modular synthesis, orthogonal post-functionalization, absorption, and chiroptical properties of cationic [6]helicenes. Angew Chem Int Ed Engl 2013; 52:1796-800. [PMID: 23288862 DOI: 10.1002/anie.201208926] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Franck Torricelli
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva 4, Switzerland
| | | | | | | | | | | |
Collapse
|
11
|
Vávra J, Severa L, Císařová I, Klepetářová B, Šaman D, Koval D, Kašička V, Teplý F. Search for Conglomerate in Set of [7]Helquat Salts: Multigram Resolution of Helicene–Viologen Hybrid by Preferential Crystallization. J Org Chem 2012; 78:1329-42. [DOI: 10.1021/jo301615k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jan Vávra
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo
n. 2, 166 10 Prague 6, Czech Republic
| | - Lukáš Severa
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo
n. 2, 166 10 Prague 6, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, 128 43
Prague 2, Czech Republic
| | - Blanka Klepetářová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo
n. 2, 166 10 Prague 6, Czech Republic
| | - David Šaman
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo
n. 2, 166 10 Prague 6, Czech Republic
| | - Dušan Koval
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo
n. 2, 166 10 Prague 6, Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo
n. 2, 166 10 Prague 6, Czech Republic
| | - Filip Teplý
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo
n. 2, 166 10 Prague 6, Czech Republic
| |
Collapse
|
12
|
Knoppe S, Dolamic I, Bürgi T. Racemization of a Chiral Nanoparticle Evidences the Flexibility of the Gold–Thiolate Interface. J Am Chem Soc 2012; 134:13114-20. [DOI: 10.1021/ja3053865] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stefan Knoppe
- Department
of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
| | - Igor Dolamic
- Department
of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
| | - Thomas Bürgi
- Department
of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
| |
Collapse
|
13
|
Liu X, Lacour J, Braunstein P. Chiral anion-based NMR enantiodiscrimination of a dinuclear, cationic Ir(i) NHC complex with a figure-of-eight loop structure. Dalton Trans 2012; 41:138-42. [DOI: 10.1039/c1dt11604e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
14
|
Vávra J, Severa L, Švec P, Císařová I, Koval D, Sázelová P, Kašička V, Teplý F. Preferential Crystallization of a Helicene-Viologen Hybrid - An Efficient Method to Resolve [5]Helquat Enantiomers on a 20 g Scale. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101367] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
15
|
Coe BJ, Fielden J, Foxon SP, Asselberghs I, Clays K, Van Cleuvenbergen S, Brunschwig BS. Ferrocenyl Diquat Derivatives: Nonlinear Optical Activity, Multiple Redox States, and Unusual Reactivity. Organometallics 2011. [DOI: 10.1021/om200604f] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Benjamin J. Coe
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - John Fielden
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Simon P. Foxon
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Inge Asselberghs
- Department of Chemistry, University of Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - Koen Clays
- Department of Chemistry, University of Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | | | - Bruce S. Brunschwig
- Molecular Materials Research Center, Beckman Institute, MC 139-74, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, United States
| |
Collapse
|
16
|
Severa L, Koval D, Novotná P, Ončák M, Sázelová P, Šaman D, Slavíček P, Urbanová M, Kašička V, Teplý F. Resolution of a configurationally stable [5]helquat: enantiocomposition analysis of a helicene congener by capillary electrophoresis. NEW J CHEM 2010. [DOI: 10.1039/c0nj00085j] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|